LIQUID-TO-LIQUID HEAT EXCHANGER

• US 3,831,672 A
• Filed: 06/02/1972
• Issued: 08/27/1974
• Est. Priority Date: 04/05/1971
• Status: Expired due to Term

• Current Assignee: Sylvester J. Battisti
• Original Assignee: Sylvester J. Battisti
• Inventors: Battisti, Sylvester J.
• Primary Examiner(s): Myhre, Charles J.
• Assistant Examiner(s): Streule, Jr., Theophil W.
• Application Number:
  US05/259,095
• Time in Patent Office: 816 Days
• Field of Search: 165/154,155,183-186,141,181,153,184
• US Class Current: 165/154
• CPC Class Codes: F28F 13/12 by creating turbulence, e.g. by stirring, by increasing the force of circulation F28F13/08 takes precedence
• CPC Class Codes: F28F 9/0234 having a second heat exchanger disposed there within, e.g. oil cooler

Abstract

A liquid-to-liquid heat exchanger adapted especially for use with an automotive vehicle radiator assembly for transferring heat from automatic power transmission fluid to the engine liquid coolant comprising a pair of cylindrical tubes adapted to be positioned in coaxial disposition within the engine radiator heater and a helical turbulator positioned within an annular space defined by the cylindrical tubes, said turbulator comprising a rolled strip with a channel cross-section, said strip being wound about the axis of the heat exchanger to form a continuous helical flow channel, thus increasing the turbulence in the field flow path for the transmission oil.

Claims

1. A liquid-to-liquid heat exchanger adapted especially for use with an automatic power transmission mechanism for cooling oil circulated through the transmission mechanism and adapted to be mounted in liquid coolant within an air cooled radiator for a liquid-cooled automotive engine comprising a pair of heat exchanger shells of generally tubular construction, one shell being situated within the other in coaxial disposition, said coolant circulating over the outer surface of the outermost shell and over the inner surface of the innermost shell, said shells defining therebetween an annular space, a turbulator construction situated in said annular space, a fluid fitting connected to the outermost shell for receiving transmission oil and a fluid flow outlet fitting connected to said outermost shell for receiving transmission oil circulated through said cooler, the flow paths defined in part by said fittings communicating with said annular space at axially spaced locations, said turbulator construction registering with said shells and forming therebetween a helical flow path for the fluid flow that passes from one of said fittings to the other, said turbulator construction comprising two parts, the first part being a helical wire surrounding the innermost skill and engaging the adjacent shell surfaces to prevent crossflow from one point in the helical flow path to another in an axial direction, the geometric axis of the helical flow path formed by said turbulator construction the second turbulator construction being a turbulator ribbon having a plurality of undulations located between the helical wire and forming in said ribbon liquid flow openings, said ribbon being wrapped around the innermost shell in helical disposition whereby the flow path is generally helical and is characterized by localized turbulance.